<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title></title>
</head>

<body>
    <script src="/js/vue.js"></script>
    <div id="app">
        <div v-bind:class="[active isActive ]"></div>
    </div>

    <script>
        let app =  new Vue({
            el:"#app"
        })
    </script>
</body>